It would be nice to have an easily accessible text field on each track (audio and midi) for notes. Craig mentioned that you can have notes on folders but it would be nice to have it extended it to all tracks. I often find myself using different synths or tempos for a song I'm covering and it would be nice to be able to annotate the track with notes about sounds I liked or the original song tempo or where I think I want to pull the fader down, etc.
Just an idea.

Not at my computer, but go to the inspector and you'll find places for notes...iirc it's up to 1024 characters under the Track tab. It's not just folders.

Or you can download VST Notes for free and lace notes on every track or there are some sticky notes programs which you can post anywhere on the screen and they will be remembered.

To add to CAs response, there is a "Description" field under "Track" in the Inspector (not Clip) to add text notes. (I'm looking @ X3e Producer version)
 
VST Notes looked interesting but does not appear to be available without taking some risk with dodgy 3rd party download sites. 

Thanks for the correction. I edited my response to say Track instead of Clip. 

There is also a notes field on each take lane

Edited to remove post: thread I had included the link to pointed to a web site that is no longer working.
 
Bob Bone